DSP56366 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56366

Digital Signal Processor

Motorola => Freescale 

Freescale Semiconductor, Inc.

Chip Errata

DSP56366 Digital Signal Processor

Mask:2J26D

Errata

Number

ES114

ES115

Errata Description

Description (added 4/19/99, revised 4/30/99):

Applies

to Mask

2J26D

A DMA channel may operate improperly when the address mode of this channel

is defined as three-dimensional (D3D=1) and DAM[5:0] = 1xx 1 10 or DAM[5:0]

= 01xx 10 (i.e., triple counter mode is E).

Workaround:

Use the triple counter modes C(DAM[1:0]=00) or D(DAM[1:0]=01) instead of the

E(DAM[1:0]=10) mode.

Description (added 4/19/99):

2J26D

When a DMA channel (called channel A) is disabled by software clearing the

channel’s DCR[DE] bit, the DTD bit may not get set, and the DMA end of the block

interrupt may not happen if one of the following occurs:

1. There is another channel (channel B) executing EXTERNAL accesses, and the

DE bit of channel A is being cleared by software at the end of the channel B word

transfer - if channel B is in Word transfer mode, or at the end of the channel B line

transfer - if channel B is in Line Transfer mode, or at the end of the channel B block

transfer - if channel B is in Block transfer mode.

2. This channel (A) is executing EXTERNAL accesses, and the DE bit of this

channel (A) is being cleared by software at the end of the channel B word transfer -

if channel B is in Word transfer mode, or at the end of the channel B line transfer -

if channel B is in Line transfer mode.

Workaround:

kAvoid executing a DMA external access when any DMA channel should be

disabled. This can be done as follows. Every time the DMA channel needs to be

disabled by software, the following sequence must be used:

;; initialize an unused DMA channel "C"

movep #DSR_swflag, x:M_DSRC

;; here DSR_swflag is an

;; unused X, Y or P memory

;; location, should

;; be initialized to

;; $800000

;; M_DSRC - address of the

;; channel C DSR register.

DSP56366 Errata

 1997 -2001, Motorola

For Mor3e66ICnfEo2rJm26aDt_io0n_0On This Product,

Go to: www.freescale.com

NG 11/12/01 pg. 10 of 25

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